CVE-2009-3695: Djangoproject Django

Medium severity, CVSS 5.0. EPSS: 3.7% chance of exploitation in the next 30 days.

Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.

Affected products

• Djangoproject Django: version 1.0 only; version 1.1 only

Published 2009-10-13. Last modified 2026-06-16.